Algebra 2 Unit 9 Lesson 1

14) Find the solution to the system of equations. {x+y=-4 {x-y=10

(3,-7)

15) Divide the complex numbers by multiplying numerator and denominator by the conjugate of the denominator.

-6/13-17/13i

10) Calculate the variance of the set of data to two decimal places. (Use to three decimal places to calculate variance if you use a calculator.) {82,84,86,88,90,92}

11.67

8) Calculate the variance of the set of data to two decimal places. (Use to three decimal places to calculate variance if you use a calculator.) {2,4,6,8,10,12}

11.67

11) Calculate the standard deviation of the set of data to two decimal places. You may use a calculator or calculate by hand. {2,4,6,8,10,12}

3.42

13) Calculate the standard deviation of the set of data to two decimal places. You may use a calculator or calculate by hand. {82,84,86,88,90,92}

3.42

12) Calculate the standard deviation of the set of data to two decimal places. You may use a calculator or calculate by hand. {2,2,2,12,12,12}

5

5) Calculate the mean of the set of data. You may use a calculator or calculate by hand. {2,4,6,8,10,12}

7

6) Calculate the mean of the set of data. You may use a calculator or calculate by hand. {2,2,2,12,12,12}

7

7) Calculate the mean of the set of data. You may use a calculator or calculate by hand. {82,84,86,88,90,92}

87

2) Choose the best answer. The ___ is the absolute value of the difference between the member and the mean of the data in a set of numerical data.

Deviation

1) Choose the best answer. The ___ is the average value of a set of numerical data, found by adding all the values and dividing by the number of elements in the set.

Mean

9) Calculate the variance of the set of data to two decimal places. (Use to three decimal places to calculate variance if you use a calculator.) {2,2,2,12,12,12}

Not 3.46

4) Choose the best answer. The ___ deviation is the square root of the variance in a set of numerical data.

Standard

3) Choose the best answer. The ___ is the average of the sum of the squared differences of the mean from each element in a set of numerical data.

Variance

16) Choose the correct equation.

f(x)=x'1/3

deviation

the absolute value of the difference between the member and the mean of the data in a set of numerical data

variance

the average of the sum of the squared differences of the mean from each element in a set of numerical data

mean

the average value of a set of numerical data, found by adding all the values and dividing by the number of elements in the set

standard deviation

the square root of the variance in a set of numerical data